1. What do metals resemble one another in? 2.What do metals greatly vary in? 3. What metal is the lightest? 4. What metal is the heaviest? 5. What is an alloy? 6. What is each constituent of an alloy called?​

1. is your teacher writing on the board now? - yes, my teacher is writing on the board now. 2. look at your   partner. what is he or she doing? - my partner is reading a book.3. is  your partner wriring in his/her notebook? - no, my partner is not writing in his/her notebook.4.  look around. what are your classmates doing now? - my classmates are preparing for the lesson now.5.  what game are the children piaying at the playground now? what do you think? - i think that children are playing hide-and-seek at the playground now.6. a re you listening to your teacher? - yes, i'm listening to my teacher at the moment.or: do you listen to your teacher? - yes, i always listen to my teacher.7.  are you answering the questions correctly? - yes, i think i'm answering the questions correctly.